INT 62 u - FGDRIVER v4.02 - "FG_KBTEST" - CHECK WHETHER SPECIFIED KEY PRESSED
	AX = 0069h
	BX = scan code of desired key
Return: AX = state
	    0000h key is not pressed
	    0001h key is currently pressed
Notes:	the FGDRIVER functions are rearranged with each major release, but
	  their parameters do not change (see #03474 at AX=0000h)
	The low-level keyboard handler must have been enabled with AX=0066h
SeeAlso: AX=0066h,AX=0067h,INT 16/AH=01h